D263 Standard Specification for Chrome Oxide Green Pigment

This specification establishes the properties and requirements for the dry pigment commercially known as chrome oxide green. The pigment shall consist of practically pure chromium sesqui-oxide without any admixture. Specimens shall be sampled and tested adequately, and shall conform to the following composition requirements: total chromium; total water-soluble matter; moisture and other volatile matter; coarse particles (total residue retained on a No. 325 sieve); and organic colors or lakes. The pigments shall adhere to mass color, tint character, and tinting strength requirements as well.